The Khronos Group - a non-profit industry consortium to develop, publish and promote open standard, royalty-free media authoring and acceleration standards for desktop and handheld devices, combined with conformance qualification programs for platform and device interoperability.

If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

Re: Non-premultiplied ARGB source with WFD_TRANSPARENCY_NONE

Lewk,

You have made a very good point. After a quick comparison between the OpenWFC and OpenWFD spec's, we see that the OpenWFD is missing a comment in this section. In section 7.1.7 of the OpenWFC specification, you will see the following comment:

"If WFC_TRANSPARENCY_SOURCE is disabled, the conversion of the source to premultiplied alpha format ignores the sourceís alpha values and instead uses an alpha value of 1."

The OpenWF working group will try to add a similar comment in the 5.8.1 section of the OpenWFD specification in the next release.

Hopefully this answers your question. Please let us know if it does not.